Motorola BC796D User Manual

51

To program an APCO 25 system, follow the steps in the appropriate section for conventional
or Motorola Trunking. APCO 25 systems require only 1 additional setting: Sound Quality.

Each APCO 25 system has slightly different system settings that control how the audio is
digitized. To get the best sound quality, you need to match as closely as possible the
system’s settings.

To adjust the sound quality:

1. While monitoring a specific APCO P-25 talkgroup, press the 

▲/HOLD key.

2. Press and hold the 9 key. On Line 1 of the screen you will see 

SOUND QULTY:

0050 (for example). This shows the Sound Quality. The lower the level the better the
Sound Quality. 

3. To manually set the sound quality, rotate the scroll bar up or down. As the threshold

adjusts in increments of 100 at the bottom of the screen watch the Sound Quality level
increase or decrease and continue to rotate the VFO until you have achieved the best
Sound Quality level.

Notes: • When APCO P-25 signal is not received, 

SOUND QULTY: **** appears

on the display.

• You must be receiving an APCO P-25 signal to make this adjustment

A chart showing the Threshold Adjustment Range is listed below.

4. Once you have adjusted the Sound Quality to the best possible level, press E.

Press RSM to exit the Sound Quality Adjustment Mode.

Notes: • To cancel the adjusted threshold level, press 

key.

• The adjusted threshold level for the current frequency can be set back to the

default value by pressing and holding the 

key.

• When you change the Sound Quality it affects all other APCO 25 signals in that

same band. (UHF, VHF, or 800MHz).

Lower

Mid

Upper

Band

Min

Default

Max

Default

Min

Default

Max

800MHz

33

533

1833

1985

2042

3342

3842

UHF

33

633

1833

1985

2042

3342

3842

VHF

330

930

2130

2147

2264

3464

4064